Sodium Arsenate

Sodium arsenate is the inorganic compound with the formula NaH2AsO4.H2O. Related salts are also called sodium arsenate, including Na2HAsO4 and Na3AsO4. This particular salt is a colorless solid that is highly toxic. The potassium salt has similar properties.

The salt is the conjugate base of arsenic acid:

H3AsO4 H2AsO
4 + H+ (K1 = 10−2.19)

It is prepared in this way and crystallized by cooling a hot saturated aqueous solution, where it is highly soluble when hot (75.3 g in 100 mL at 100 °C). A fine white powder of the monohydrate crystallizes. Upon heating, the solid loses water of crystallization and then the dihydrogenarsenate anions condense to give Na2H2As2O7 and, above 230 °C, NaAsO3.

Other articles related to "arsenate":

List Of Minerals F–G (complete) - F
... Ferrarisite (1979-020) 08.CJ.30 (IUPAC Pentacalcium di(hydrogen arsenate) diarsenate nonahydrate) Ferriallanite-(Ce) (2000-041) 09.BG.05b Ferriallanite-(La) (2010-066) 09.BG.05b Ferri-clinof ...
List Of Minerals C (complete) - C
... Calcium dititanium pentaoxide monohydrate) Cahnite (Y 1927) 06.AC.70 (IUPAC Dicalcium boron arsenate tetrahydroxyl) Calaverite (Y 1868) 02.EA.10 (IUPAC Gold ditelluride) Calciborite (Y ... Chernovite-(Y) (1967-027) 08.AD.35 (IUPAC Yttrium arsenate) Chernykhite (1972-006) 09.EC.15 (BaV3+2(Si2Al2)O10(OH)2) Chervetite (Y 1963) 08.FA.15 (IUPAC Dilead divanadium(V) heptaoxide ...
List Of Minerals F–G (complete) - G
... Gabrielsonite (1966-011) 08.BH.35 (IUPAC Lead iron arsenate hydroxyl) Gadolinite-(Ce) (Y 1978) 09.AJ.20 Gadolinite-(Y) (Y 1802) 09.AJ.20 Gagarinite-(Ce) (1993-038, IMA 10-C) 03.AB.35 ...

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